206685971266 has 16 divisors (see below), whose sum is σ = 326468338560. Its totient is φ = 97867260720.

The previous prime is 206685971221. The next prime is 206685971341. The reversal of 206685971266 is 662179586602.

It is a self number, because there is not a number n which added to its sum of digits gives 206685971266.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 914170 + ... + 1117621.

It is an arithmetic number, because the mean of its divisors is an integer number (20404271160).

Almost surely, 2^206685971266 is an apocalyptic number.

206685971266 is a deficient number, since it is larger than the sum of its proper divisors (119782367294).

206685971266 is a wasteful number, since it uses less digits than its factorization.

206685971266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2034489.

The product of its (nonzero) digits is 13063680, while the sum is 58.

The spelling of 206685971266 in words is "two hundred six billion, six hundred eighty-five million, nine hundred seventy-one thousand, two hundred sixty-six".